The Effect Of Acupuncture With Balance Of Yin And Yang On The Surface EMG Signal Of Patients With Upper Limb Spasm After Stroke

Objective:To explore the effect of yin-yang balancing acupuncture for poststroke patients with upper limb spasticity by surface electromyography and provide evidences for clinical application of treating spasticity after stroke.Methods:40 patients meeting the included criteria were randomly allocated to two groups,the yin-yang balancing acupuncture group and the control group.Each group has 20 patients.Acupuncture will be conducted by for 30 minutes,six times per week for 2weeks.(1)surface EMG indicators related with spasticity are RMS and iEMG,which were used to detect the sEMG signals of unaffected limb.(2)the RMS values and iEMG values were observed on affected limb before and after treatment.(3)the FMA,MBI and MAS were used to assess the function of patients before and after treatment.Results:1.The RMS values of biceps and triceps on unaffected limb in treatment group were2.10±1.12 uV and 2.00±0.86 uV while the iEMG values were 0.15±0.37uV·s and0.15±0.37uV·s.The RMS values of biceps and triceps on unaffected limb in control group were 2.16±1.12 uV and 1.89±0.66 uV while the iEMG values were0.16±0.37uV·s and 0.11±0.32uV·s.There was no significant difference between two groups(P>0.05).2.After treatment,the RMS value and iEMG value of the biceps muscles were significantly decreased(P<0.01).The RMS values of the biceps muscles were significantly improved in the treatment group than in the control group(P<0.05).There was no significant difference between the two groups about iEMG values after treatment(P>0.05).3.After treatment,the RMS values of the triceps muscles were significantly lower than before(P<0.01),and the iEMG values had no significant change(P>0.05).There was no significant difference between the two groups about RMS and iEMG values after treatment(P>0.05).4.After treatment,the MAS scores of the biceps muscles in treatment group were significantly reduced(P < 0.05)while the control group didn't show significantchange(P > 0.05).After treatment,the MAS scores of the triceps muscles had no significant change in the treatment and control groups.There was no significant difference between the two groups about MAS scores of the triceps muscles after treatment(P>0.05).5.The FMA and MBI values were significantly higher in two groups after treatment(P<0.01).Compared with the control group,the FMA values in treatment group were significantly enhanced(P < 0.05).There was no significant difference between two groups about the MBI values(P>0.05).The effective rate of the treatment group was70.00% while the control group was 47.36%.There was no significant difference between two groups about the effective rate(P>0.05).Conclusions:1.Both groups can partially reduce the spastic-related surface EMG values of biceps and triceps muscles.The yin-yang balancing acupuncture has more effect on the surface EMG of biceps muscles than the conventional acupuncture.2.Both groups can alleviate upper limb paralysis,improve upper limb motor function and improve daily living ability.The yin-yang balancing acupuncture is better than conventional acupuncture for upper limb paralysis and motor function.3.The yin-yang balancing acupuncture is a safe and valid method for poststroke spasticity,but it should be verified by more large-scale high-quality studies.